Complicated fault block fluvial facies reservoir oil water well using situation split system

Abstract

The invention relates to a method for tapping the potential in the late stage of an oil field, analyzing the remaining oil distribution of each oil sand body, quantifying the remaining resource amount of each oil sand body, and proposing the production status of oil-water wells in complex fault block fluvial facies reservoirs in the direction of potential tapping. Sub-analysis system, this system includes data inspection device, data preprocessing device, KH value splitting device, oil well water absorption pretreatment device, water absorption profile splitting device, dynamic personnel subjective analysis splitting device, small layer weighted splitting result device 1. Single sand body splitting result summary device and database, assign the weight of production splitting according to water injection effect, formation coefficient (KH) and reservoir analysis of dynamic personnel; determine layered production fluid volume according to water absorption profile monitored by water injection well; The fluid production profile of the oil well is used to determine the water cut of the layer, and the dynamic and static multi-information is used to split the production status. The entire calculation process is computerized, fast and accurate.

Description

technical field [0001] The invention relates to a method for tapping the potential in the late stage of an oil field, analyzing the remaining oil distribution of each oil sand body, quantifying the remaining resource amount of each oil sand body, and proposing the production status of oil-water wells in complex fault block fluvial facies reservoirs in the direction of potential tapping. analysis system. Background technique [0002] my country's oilfields are mostly onshore oilfields with developed fluvial reservoirs. There are many faults and complex structures. The distribution of oil layers is controlled by both structure and lithology, and the continuity is poor. There are many relatively independent oil sand bodies scattered in the oil reservoirs. Due to the complexity of reservoirs, the diversity of mining methods, and the constant adjustment and potential excavation work, the distribution of remaining oil becomes highly dispersed and extremely complicated both horizon...

AI Technical Summary

Problems solved by technology

Field application and practice have proved that the conventional oil-water well producing status analysis method has high credibility and applicability for sandstone reservoirs with small production intervals, few perforated layers, and weak reservoir heterogeneity. Strong; but for complex fault-block fluvial reservoirs with strong reservoir heterogeneity, long production intervals and many perforated layers, its applicability is poor

At present, most oilfields on land in China are fluvial reservoirs. Fluvial reservoirs have many oil reservoirs in the vertical direction, with large reserves, serious heterogeneity, and low recovery rate. They are the areas with the largest remaining oil potential in continental formations.

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